Emailing problems – CamScanner - PDF Scanner App Review

This app has a promising idea that could be useful if it worked, but when it won’t even let you email the documents that you have scanned to anyone it just seems frustrating. I downloaded it so I could send my calculus final to my teacher electronically as a result of the coronavirus school closures. I have been unable to successfully email the final as of now. Do i need a membership to email things? If anyone has any clues let me know. Help would be appreciated.
Review by just tryin to get by on CamScanner - PDF Scanner App.